The core functionality of the SOS app refers to its essential features and capabilities that are central to its purpose of providing immediate assistance and support in emergency situations. These functionalities are fundamental to the app's operation and are designed to ensure users can quickly and effectively communicate their distress and receive help when needed. Here are the core functionalities typically found in an SOS app:

Alerting System: The ability to send distress signals or alerts to predefined contacts or emergency services with minimal effort, usually through a single tap or voice command.

Location Tracking: Real-time GPS tracking to pinpoint the user's location accurately, allowing responders to locate them swiftly.

Emergency Contacts Management: A feature to manage and update a list of emergency contacts, including friends, family, and relevant authorities, ensuring quick access to help when required.

Custom Messages: The option to personalize distress messages with specific details about the situation or needs, providing additional context to responders.

Health Information Storage: A functionality to store essential medical information, such as allergies, medications, and medical conditions, to assist responders in providing appropriate care.

Audible Alerts: An audible alert or siren feature to attract attention and signal distress, especially in noisy or crowded environments.

These core functionalities form the foundation of an SOS app, providing users with the necessary tools to communicate their emergencies effectively and receive prompt assistance when facing critical situations. Additional features may complement these core functionalities, enhancing the overall usability and effectiveness of the app.